Advantages and disadvantages
What are the advantages and disadvantages of WordPress Multisite?
As mentioned above, it simplifies maintenance for multiple blogs / websites. There is only one file base, so only one file base and the same WordPress installation for all blogs / websites.
However, for each blog / website then exist separate database tables. With an update, all blogs can be updated at one go - no matter if only a plugin is updated or a new WordPress version is available. Furthermore, new / additional websites can be created very easily.
Depending on your needs, these websites can be reached via "subdirectories" or "subdomains".
So either about
or else via
You also have the option to set up a separate domain for each website, but this only works via additional plugins in the blog network (Domain Mapping) and requires some technical tweaking to make the domains work properly.
There is actually only one small hurdle, because not all plugins work flawlessly with multisites, however, the number of those that do not is now rather small.
Furthermore, you should be aware that the effectiveness of a WordPress multisite decreases the more different the individual websites are. For example, if each site in the multisite uses completely different plugins and there is no common intersection, then in the end everything must be tested again individually and also the probability of compatibility problems can increase.
A technical basis for all websites has many advantages, but one notable disadvantage should not go unmentioned.
If there is a malfunction in the WordPress multisite system, all websites are usually affected. A failure would thus be global.
Due to the very good exception management in WordPress, fatal errors that lead to a real and complete failure are rather low.